CuSn8Zn4
| Common name | Material description | World specifications |
||
|---|---|---|---|---|
| European | British | American | ||
| Low lead alloy for drinking water | CuSn8Zn4 | - | - | C90300 (ASTM B 505) |
Other name: GREEN ALLOYS, alloys without lead, alloys with very low lead content
The equivalence between the standards is not absolute and some variations in composition can exist.
Chemical Composition in % (ASTM B 505, Castings)
| Cu | Sn | Pb | Zn | Ni | Al | Fe | Mn | P | S | Si | Sb | As | Cr | Bi | Cd | Se | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 86.0 | 7.5 | - | 3.0 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Max | 89.0 | 9.0 | 0.30 | 5.0 | 1.0 | 0.005 | 0.2 | - | 0.05 | 0.05 | 0.005 | 0.2 | - | - | - | - | - |
Mechanical Properties (ASTM B 505, Castings)
| Rm | Tensile strength min. | 303 N/mm2 |
| Rp0.2 | Proof Strength min. | 152 N/mm2 |
| A | Elongation min. | 18 % |
| HB | Brinell hardness min. | - |
Properties:
Hard, strong, tough, resistant to wear and fine-grained, good machinability and corrosion-resistant to sea water, good resistance to pounding.
It resists corrosion from seawater and stands up to impacts and wear. It also machines easily and can be cast.
Application:
Worm wheels, gears, bushings for heavy loads and low speeds,
valves, plumbing fixtures, portable water applications, gears, marine fittings and pump components.
Typical applications include aircraft landing-gear bushings, trunnion and trolley wheel bearings, and wristpin bushings.